can you use wd 40 to lubricate ?

I recently bought a nak ca7 preamp, everyting works fine but i found the volume knob too tight to turn.
can i add some wd40 to loosen it up?
Radio Shack sells some sort of tuner cleaner that's made for this kind of application. WD40 may contaminate the pot.
Don't use WD40. Go with Sfstereo's recommendation. It works well.
WD40 is terrible. In some instances it will actually hasten corrosion.

Asked a similar question a bit ago under the heading "Source Selector Fix-It Tips" and got some excellent replies. I think it's here It did me right.